Sony M-540-V Service manual
M-540V
SERVICE MANUAL
Ver 1.0 2001. 02
SPECIFICATIONS
Tape
Recording system
2-track 1-channel monaural
Speaker
Approx. 3.6 cm (1
Tape speed
2.4 cm/s (
Frequency range
300 – 4,000 Hz (with TAPE SPEED switch at 2.4 cm/s)
Output
Earphone jack (minijack) for 8 – 300 ohms earphone
Power output (at 10% harmonic distortion)
250 mW
Power requirements
3 V DC batteries R6 (size AA) × 2/External DC 3V power sources
Dimensions (w/h/d)
Approx. 62.2 × 121.5 × 24.3 mm (2
parts and controls
Mass
Approx. 125 g (4.5 oz)
Supplied accessories
Microcassette tape MC-30 (1) (Europe only)
(normal position type)
7
⁄16 in.) dia.
15
⁄16 ips), 1.2 cm/s (15⁄32 ips)
1
⁄2 × 47⁄8 × 31⁄32 in.) incl. projecting
E Model
Chinese Model
East European Model
Model Name Using Similar Mechanism M-530V/535V/630V
Tape Transport Mechanism Type MZ-530V-99
9-873-088-11
2001B1600-1
© 2001.2
Design and specifications are subject to change without notice.
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
MICROCASSETTE
-CORDER
TM
M-540V
TABLE OF CONTENTS
1. GENERAL ....................................................................3
2. DISASSEMBLY
2-1. Lid Assy , Cassette ........................................................... 4
2-2. Lid, Battery Case ............................................................ 5
2-3. Cabinet (Rear) Assy........................................................ 5
2-4. Main Board ..................................................................... 6
2-5. Mechanism Deck ............................................................ 6
2-6. Head, Ceramic (HRPE901) ............................................7
3. MECHANICAL ADJUSTMENTS ..............................8
4. ELECTRICAL ADJUSTMENTS ...............................8
5. DIAGRAMS
5-1. Block Diagram.............................................................. 11
5-2. Printed W iring Board.................................................... 12
5-3. Schematic Diagram....................................................... 13
6. EXPLODED VIEWS
6-1. Cabinet Section............................................................. 14
6-2. Mechanism Deck Section ............................................. 14
7. ELECTRICAL PARTS LIST ..................................... 15
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
2
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Recording
Make sure that nothing is connected to MIC (M-640V only).
EAR
MIC (PLUG IN
POWER)
VOR
TAPE SPEED
TAPE COUNTER
BATT
Microphone
REC
> PAUSE
z
m CUE/
REVIEW M
xZ
SECTION 1
GENERAL
To monitor the sound
Connect an earphone (not supplied) to EAR jack. The monitor
volume cannot be adjusted by VOL.
To prevent a cassette from being accidentally recorded
over
Break out and remove the cassette tabs. To reuse the cassette for
recording, cover the tab hole with adhesive tape.
Playing a Tape
M-540V
This section is extracted
from instruction manual.
xZ
1 Press the reset button of the TAPE COUNTER (M-640V/
540V only).
2 Press xZ and insert a standard microcassette with the side
to start recording facing the lid.
3 Select the desired tape speed.
2.4 cm for optimum sound (recommended for normal use):
A 30-minute recording can be made using both sides of the
MC-30 microcassette.
1.2 cm for longer recording time: A 60-minute recording can
be made using both sides of the MC-30 microcassette.
4 Set VOR to H, L or OFF (M-640V/540V only).
If you set VOR to H or L, the unit automatically starts
recording the sound and pauses when there is no sound
(you can save tapes and batteries).
H : To record at meeting or in a quiet and/or spacious place.
L : To record for dictation or in a noisy place.
When the sound is not loud enough, set it to OFF, or the unit
may not start recording.
5 Press z.
n is pressed simultaneously and recording starts. While
the tape runs, the REC lamp or REC/BATT lamp lights and
flashes depending on the strength of the sound (M-640V/
540V only).
Recording level is fixed.
To
Stop recording
Start recording during
playback
Review the portion just
recorded
Pause recording
Take out a cassette
Note
Select the 2.4 cm tape speed for recording, if you play back the recorded
tape with another unit. Otherwise, the sound quality may be changed.
Notes on VOR (Voice Operated Recording) (M-640V/540V only)
• The VOR system depends on the environmental conditions. If you
cannot get the desired results, set VOR to OFF.
• When you use the system in a noisy place, the unit will stay in the
recording mode. If the sound is too soft, on the contrary, the unit will
not start recording. Set VOR to H (high) or L (low) depending on the
conditions.
Press or slide
xZ
z during playback (the unit becomes in the
recording mode)
Push up mCUE/MREVIEW toward
MREVIEW during the recording. Release the
button at the point to start playback.
Slide >PAUSE in the direction of the arrow.
The REC/BATT (M-540V), BATT (M-430) or
REC (M-640V) lamp goes off.
xZ
EAR
VOL
> PAUSE
BATT
TAPE SPEED
n
m CUE/
REVIEW M
xZ
FAST PB
1 Insert a cassette with the side to start playing facing the lid.
2 Select the tape speed to the same speed as that used for
recording.
3 Press n.
4 Adjust the volume.
To
Stop playback/stop fast
forward or rewind*
Pause playback
Fast forward
Rewind
Search forward during
playback (CUE)
Search backward during
playback (REVIEW)
* If you leave the unit after the tape has been wound or rewound, the
batteries will be consumed rapidly. Be sure to depress xZ.
Note
If the tape is completely wound or rewound while searching forward/
backward during playback (CUE/REVIEW), the mCUE/MREVIEW
switch may not return to the center position when you release the switch.
In this case, push back the switch to the center to start playback.
Press or slide
xZ
Slide >PAUSE in the direction of the
arrow.
The REC/BATT (M-540V) or BATT (M-
430) lamp, or BATT lamps (M-640V) go
off.
Slide mCUE/MREVIEW toward
mCUE during stop.
Slide mCUE/MREVIEW toward
MREVIEW during stop.
Keep mCUE/MREVIEW pushed
down during playback and release it at
the point you want.
Keep mCUE/MREVIEW pushed up
during playback and release it at the
point you want.
If you plug in headphones (not supplied) to the EAR jack, you
will get monaural output from both left and right channels.
To increase the playback speed (M-640V only)
Slide the FAST PB switch in the direction of the arrow. The
playback speed will be increased.
To return to the original speed, slide the FAST PB switch to the
original position.
At the end of the tape
In the recording or playback mode, the tape stops at the end of
the tape and the locked buttons will be released automatically
(Automatic shut-off mechanism).
After fast forward or rewind, be sure to set mCUE/
MREVIEW back to the center.
3
M-540V
SECTION 2
DISASSEMBLY
• The equipment can be removed using the following procedure.
Set Lid assy,
cassette
Lid,
battery case
Note : Follow the disassembly procedure in the numerical order given.
2-1. LID ASSY, CASSETTE
Cabinet (rear)
assy
Main
board
Mechanism
deck
Head,
ceramic (HRPE901)
top view
4
lid assy, cassette
3
cabinet (front)
precision screwdriver
or equivalent
2
Stop the lid assy, cassette
halfway.
precision screwdriver
or equivalent
1
Note : When removing the cassette lid, put cloth on the end of a
screwdriver or use a polyacetal driver to avoid damage to
the cabinet.
9
lid assy, cassette
5
claw
6
8
axis
7
axis
4
2-2. LID, BATTERY CASE
3
two claws
2
M-540V
2
1
2-3. CABINET (REAR) ASSY
Note : When installing, fit the knobs and switches.
1
two screw (1.7x16)
knob
switch
4
lid, battery case
3
screw (B1.7x5), tapping
2
two screw (1.7x16)
5
claw
6
cabinet (rear) assy
knob
switch
4
two claws
5
M-540V
2-4. MAIN BOARD
5
mic assy
1
Unsolder the 2 places.
7
(M1.4x3.0), locking
2
Unsolder the 2 places.
8
(M1.4x3.0), locking
3
Unsolder the 4 places.
4
Unsolder the 2 places.
qa
MAIN board
5
Unsolder the 2 places.
2-5. MACHANISM DECK
•
How to apply the belts
flywheel assy
belt (counter, tape)
M901
2
button (REC)
belt (flywheel)
button (PLAY)
3
1
5
mechanism deck
(MZ-530V-99)
4
button (STOP)
6
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